I turned an old Webster carcass into a guitar amp. My goal was to use as many of the money parts as possible. Luckily, the PT, OT and choke were all good. I used all new caps and resistors of course, but re-used the octal sockets; they're the kind with the snap rings. I worked up a simple schematic, which of course took me weeks to figure out exactly how I wanted to do it. Tubes are NOS 5y3, the 6V6 that came with it (of dubious goodness, but it makes sound), and newish 12ax7 and used 5879. Shockingly, I only wired one minor thing wrong
and when I fixed that it fired right up. I used the old chassis too, so the layout isn't what I would have preferred, but it doesn't hum *too* bad with the volume full up.
Schematic is attached, as built. I ran it into an 8ohm speaker as that's all I have loose, but I want to pull one of the Weber 4ohms and hook to it. I'm guessing with the single 6V6 I should be careful about speaker load? The original schematic called for a 3.2ohm.
The paralleled 12ax7 into the 5879 sounds pretty good so far, but I haven't played with it much so we'll see how I like everything after it gets some playing time. I haven't written down voltages yet, but will tomorrow.
Anyway, ANY comments or criticisms on the schematic are as always appreciated, and I really only posted this very simple build because without this board I never would have gotten the fundamentals needed to do something like this. Not trashing any other boards out there, but this one tends to stick to electrical science instead of sniffing the mojo, so to speak. Thank you to everyone here!
Topic: Webster re-do (Read 1937 times)